SpringBoot整合阿里Druid数据源及Spring-Data-Jpa
最近开辟了一个新项目,因为初期考虑到可能会调整数据库的风险,所以orm,在设计之初就考虑为Spring Data Jpa, 以下是工程data层数据,整体是参照配置多数据源的方案,进行配置的
目录
因为阿里数据源
Druid整合数据源及其他事务配置
pom依赖
整合事务
@EnableAutoConfiguration@SpringBootApplication@EnableTransactionManagement@ComponentScan(basePackages = {"com.inn.developer"})public class CodeApplication {public static void main(String[] args) {new SpringApplicationBuilder().web(true).sources(CodeApplication.class).run(args);}}
创建 DruidProperties配置
@Data@AllArgsConstructor@NoArgsConstructor@ConfigurationProperties(prefix = "druid")public class DruidProperties {...
数据库参数可以参考:
| 参数 | 默认值 | 解释 |
|---|---|---|
| initialSize | 3 | 初始化配置 |
| minIdle | 3 | 最小连接数 |
| maxActive | 15 | 最大连接数 |
| maxWait | 5000 | 获取连接超时时间（单位：ms） |
| timeBetweenEvictionRunsMillis | 90000 | 连接有效性检测时间(单位:ms) |
| testOnBorrow | false | 获取连接检测 |
| testOnReturn | false | 归还连接检测 |
| minEvictableIdleTimeMillis | 1800000 | 最大空闲时间(单位ms) |
| testWhileIdle | true | 在获取连接后，确定是否要进行连接空间时间的检查 |
|
||
| 1：minEvictableIdleTimeMillis(最大空闲时间)：默认为30分钟，配置里面不进行设置。 |
2：testOnBorrow ,testOnReturn 默认为关闭，可以设置为不配置。
3：testWhileIdle(在获取连接后，确定是否要进行连接空闲时间的检查)。默认为true。配置里面不再进行设置。
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流程说明：
1：在第一次调用connection的时候，才会进行 initialSize的初始化。
2：心跳检测时间线程，会休眠timeBetweenEvictionRunsMillis时间，然后只对(没有borrow的线程 减去 minIdle)的线程进行检查，如果空闲时间大于minEvictableIdleTimeMillis则进行close。
3：testWhileIdle必须设置为true，在获取到连接后，先检查testOnBorrow，然后再判定testwhileIdle，如果连接空闲时间大于timeBetweenEvictionRunsMillis，则会进行心跳检测。
4：不需要配置validationQuery，如果不配置的情况下会走ping命令，性能更高。
5：连接保存在数组里面，获取连接的时候，获取数组的最后一位。在imeBetweenEvictionRunsMillis时是从前往后进行检查连接的有效性。
配置数据源及hibernate适配
数据源对象创建还是和之前一样, 笔者不太喜欢xml的方式,所以还是采用配置类
DruidAutoJpaConfiguration
@Configuration@EnableConfigurationProperties(DruidProperties.class)//开启属性注入,通过@autowired注入@ConditionalOnClass(DruidDataSource.class)//表示对应的类在classpath目录下存在时，才会去解析对应的配置文件@ConditionalOnProperty(prefix = "druid", name = "url")@EnableJpaRepositories(basePackages = "com.inn.developer.model.dao",transactionManagerRef = "jpaTransactionManager", entityManagerFactoryRef = "localContainerEntityManagerFactoryBean")public class DruidAutoJpaConfiguration {@Autowiredprivate DruidProperties properties;@Bean(name = "druidDataSource")@Primarypublic DataSource dataSource() {DruidDataSource dataSource = new DruidDataSource();dataSource.setUrl(properties.getUrl());dataSource.setUsername(properties.getUsername());dataSource.setPassword(properties.getPassword());dataSource.setTimeBetweenEvictionRunsMillis(properties.getTimeBetweenEvictionRunsMillis());if (properties.getInitialSize() > 0) {dataSource.setInitialSize(properties.getInitialSize());}if (properties.getMinIdle() > 0) {dataSource.setMinIdle(properties.getMinIdle());}if (properties.getMaxActive() > 0) {dataSource.setMaxActive(properties.getMaxActive());}dataSource.setTestOnBorrow(properties.isTestOnBorrow());dataSource.setValidationQuery("select version()");try {dataSource.init();} catch (SQLException e) {throw new RuntimeException(e);}return dataSource;}/*** hibernate 适配器,定制方言为mysql,并打印sql** @return*/@Bean(name = "hibernateJpaVendorAdapter")@Primarypublic HibernateJpaVendorAdapter hibernateJpaVendorAdapter() {HibernateJpaVendorAdapter hibernateJpaVendorAdapter = new HibernateJpaVendorAdapter();hibernateJpaVendorAdapter.setShowSql(true);hibernateJpaVendorAdapter.setDatabasePlatform("org.hibernate.dialect.MySQL5Dialect");return hibernateJpaVendorAdapter;}@Bean(name = "localContainerEntityManagerFactoryBean")@Primarypublic LocalContainerEntityManagerFactoryBean entityManagerFactoryBean(@Qualifier("druidDataSource") DataSource dataSource,@Qualifier("hibernateJpaVendorAdapter") HibernateJpaVendorAdapter hibernateJpaVendorAdapter) {LocalContainerEntityManagerFactoryBean local = new LocalContainerEntityManagerFactoryBean();local.setDataSource(dataSource);local.setJpaVendorAdapter(hibernateJpaVendorAdapter);local.setPackagesToScan("com.inn.developer.model.domain");Properties properties = new Properties();properties.put("hibernate.format_sql", true);properties.put("hibernate.hbm2ddl.auto", "update");local.setJpaProperties(properties);return local;}@Bean(name = "jpaTransactionManager")@Primarypublic JpaTransactionManager jpaTransactionManager(@Qualifier("localContainerEntityManagerFactoryBean") LocalContainerEntityManagerFactoryBean entityManagerFactoryBean) {JpaTransactionManager jpaTransactionManager = new JpaTransactionManager();EntityManagerFactory object = entityManagerFactoryBean.getObject();jpaTransactionManager.setEntityManagerFactory(object);return jpaTransactionManager;}
pom依赖
<dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-data-jpa</artifactId></dependency><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><version>1.16.6</version><scope>provided</scope></dependency><dependency><groupId>com.alibaba</groupId><artifactId>druid</artifactId><version>1.0.11</version></dependency><!--依赖Spring 4.3.6之core、context、aop、beans、tx、orm和spring data commons --><dependency><groupId>org.springframework.data</groupId><artifactId>spring-data-jpa</artifactId><version>1.11.3.RELEASE</version></dependency><!--hibernate 实现JPA的框架 --><dependency><groupId>org.hibernate</groupId><artifactId>hibernate-entitymanager</artifactId><version>5.2.5.Final</version></dependency><!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-core --><dependency><groupId>org.hibernate</groupId><artifactId>hibernate-core</artifactId><version>5.2.11.Final</version></dependency><!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-annotations --><dependency><groupId>org.hibernate</groupId><artifactId>hibernate-annotations</artifactId><version>3.5.6-Final</version></dependency>